Perhaps you should try some spelling variations:
cua triet » su triet, va triet
trung va » truong va, trang va, trung ha
hanh tai » thanh tai, hang tai, han tai
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va cao
va dau » va dao

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. lieu ((va cau) OR (va dau)) trung va hanh tai ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. lieu ((va cau) OR (va dau)) trung va hanh tai ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. lieu ((va cau) OR (va dau)) trung va hanh tai ((cua triet) or (cua viet))*.